Non-parametric Tests e.g., Chi-Square. Parametric Interval or ratio data Name parametric tests we covered Tuesday. Non-parametric Ordinal and nominal data. When to use various statistics. Parametric Tests. To compare two groups on Mean Scores use t-test.
To compare two groups on Mean Scores use t-test.
For more than 2 groups use Analysis of Variance (ANOVA)
Can’t get a mean from nominal or ordinal data.
Chi Square tests the difference in Frequency Distributions of two or more groups.
Chi-Square x2= 7.34, df = 2, p<.001
Frequencies in each cell
Mean and Standard Deviation of each group
The values in the frequency table will look like Expected Values
The distribution of both groups will look like Population Distribution